OLED Panel Lead Layout With Shielding Lines for Touch Interference
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Solution Overview
Problem
The mutual interference between touch signals and data signals in OLED displays due to coupling capacitance between touch leads and data leads is not effectively addressed in existing technologies.
Innovation Solution
A display panel design that includes a shielding line positioned between the orthographic projections of touch leads and data leads, alternately distributing touch and data lead sets, and employing multiple shielding sub-lines and via holes to shield the electric field, thereby reducing coupling capacitance and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch leads and data leads are configured in the OLED display, then touch functionality and data transmission are enabled, but coupling capacitance between the leads causes mutual interference between touch signals and data signals
Solution Approach 1:
The patent introduces a shielding lead as an intermediary element positioned between the touch leads and data leads. This shielding lead acts as a mediator that blocks the electric field coupling between the two signal types, thereby reducing mutual interference while allowing both touch and data functions to operate simultaneously
Solution Approach 2:
The patent extracts the harmful coupling capacitance effect by introducing a separate shielding component that is electrically connected to ground or reference potential. This shielding lead is extracted as a distinct functional element that removes the interference problem without affecting the core touch and data signal transmission paths
2Object-affected harmful factors
If shielding lines are added to reduce coupling capacitance, then mutual interference between touch and data signals is reduced, but device structure and manufacturing complexity increase
Solution Approach 1:
The patent merges the shielding lead with the existing lead framework by integrating it into the same lead set structure. The shielding lead is configured to share routing paths and connection points with touch and data leads, thereby providing shielding functionality while minimizing additional structural complexity
Solution Approach 2:
The shielding lead is designed to serve multiple functions: it provides electromagnetic shielding between touch and data signals, acts as a reference potential plane, and can be integrated with existing ground structures. This multi-functionality reduces the need for separate dedicated shielding components
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed design effectively shields the electric field generated by touch leads, reducing mutual interference between touch and data signals, improving display and touch effects, and facilitating a narrow frame design while minimizing manufacturing costs.
Implementation Method 1
an orthographic projection, on the substrate, of the shielding line being positioned between an orthographic projection, on the substrate, of the touch lead and an orthographic projection, on the substrate, of the data lead
Implementation Method 2
the coupling capacitance between the touch leads and the data leads will lead to mutual interference between touch signals and data signals
Data Source
AI summary
A display panel, including: a substrate base plate; touch electrodes; touch lead wires on the substrate base plate, one end of the touch lead wire is coupled with the touch electrode, the other end thereof is in a peripheral area, the touch lead wires in the display panel are divided into touch lead wire sets, each touch lead wire set includes touch lead wires; data lead wires on the substrate base plate in the peripheral area, the data lead wires are divided into data lead wire sets, each data lead wire set includes data lead wires, the touch lead wire sets and the data lead wire sets are distributed in a staggered manner; at least one shielding line on the substrate base plate in the peripheral area, an orthographic projection of the shielding line is between orthographic projections of the touch lead wire and the data lead wire.